VEX LED License Plate Design (With Linked Files)

Hi everyone, during the last few months I’ve came up with the idea of a luminating license plate. After reading some threads, I came to the understanding that if the plate does not luminate due to certain failures, it still needs to be recognizable (Red or Blue alliance and Team Number).
Therefore, this is my 1.0 LED license plate design, with a white blacklight and replacable red/blue color filters, with cutouts for the team number.


(The real thing looks a touch brighter than the picture)

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This sounds facinating. Is the content on the LED Plate changable? O.o

Fundamentally, the design consists a few parts:

  1. LED Backlight
    a. LED lightsource
    b. Light-Guide Plate
    c. Reflective layer
    d. DIffusion layer
  2. Color Filter of Red and Blue
  3. Enclosure for everything
  4. Power Supply (12v battery for now)

For the official license plates, they have mounting holes that are 2in. * 4in. I chose to add half an inch on each side (2.5in. * 4.5in. ) so that a bigger luminating area is ensured.

(PS: I’m still at school, but I’ll post the detailed designs and files later. :wink:

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woah that’s really cool - what material did you use to make the outside mounting bracing?

oh also, number neighbors here (10), it’s been a while since I’ve seen someone from another team with a two digit number besides 12

any chance you can sent the part links to where you got the light related stuff its pretty cool. seems like a fun between seasons project

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The DIYed LGP works fairly well.
If you want to replicate this still imperfect design, the LGP has the dimensions of 105mm*59mm, with 4mm bevels on the sides (actually, about 3mm of bevel may be better)

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Under the LGP, I used silver reflective tape as an reflection layer.

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The enclosure alllows for a 4mm wide 12v LED stripe mounted to the top. The light-guide plate (LGP) then spreads the light.


Finding matching LED stripes and LGPs are probably the hardest of the project. If you don’t know what a LGP is, just google it.
Or maybe have a look at this:
A Hacker’s Introduction To DIY Light Guide Plates | Hackaday

For my case, affordable LGPs seem to be hard to find in China, so I bought 4mm thick acryllic plates and (thanks to the laser engraver at our workshop) laser engraved an array of dots.

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The bottom enclosure of the plate.
The larger through holes are for #8 screws.
The smaller are for m3 screws, which secure the plate itself together.
There is also a through hole on the right for wires of the LED.

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Very nice! Vex should start selling them :rofl:

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IDK but are the mods like all sleeping or what :joy:
Some of my subsequent posts have been “awaiting approval” for like 8 hours :wink: :melting_face:

[un]fortunately, moderating VEX Forum is not my full time job. I can say the same for everyone else on staff. We make time to read and approve posts when possible, but it is impossible for a moderator or admin to be online at all times.

I personally try and check the forums every couple of hours to go through and approve posts, but this obviously can vary. Especially this time of year as just about everyone in the Greenville offices (and elsewhere!) are preparing for Worlds in a few weeks.

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I’m in China, so whatever things I got are from Chinese shopping sites (Taobao). I’m afraid that my links won’t help you, but I think you can get equivalents anyways.

Basically, what you need to secure first is the light source, as it decides the power supply and thickness of your whole design. I just found 12v 4mm LED PCB stripes, then bought corresponding 4mm acryllic plates and 12v battery packs.

Perhaps you can look for similar stuff on like Aliexpress, the Global equivalent of Taobao in case you don’t know.

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If you meant by the enclosure, I 3D printed it with PLA.
I’m not particularly sure about our team number. It’s only my second year in VEX. It’s some part of our school’s team’s legacy I think :joy:
Anyways, its great to know you :slight_smile:

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Here is a sketch with dimensions of plate’s base

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By the way, I use metric measurements. For convenience, you may see dimensions like 9*12.7mm (12.7mm for half an inch).


Size comparsion with the official license plate

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Full respect sir to you and your colleagues :wink:, I was just joking for a bit on my side of things

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LED License Plate Release 1.0.zip (69.5 KB)
Here are the files of my specific design, containing the upper and lower parts of the enclosure, LGP for scale, design for the diffusion plate, and a DXF of dot-array which I used to laser-engrave on the LGP.

(PS: These files are strictly designed for my 4mm wide LED strip with 22awg wire, so be careful if your LED has different specs.

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thanks that helps alot

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hmmm…
I‘m still thinking though, maybe at some point when I finalized my designs I can sell some parts-packs with everything included. You think people will buy it?

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